Alright guys, I'm going to try to help you the best I can as it seems no one else will....now the last time I played Splinter Cell was last June, borrowed it from a friend and I beat it in about a week. So I'm going to need a very good description of the level, exactly where your at, and what you're having trouble with. From your post it sounds like that one mission with the fish tank (where you blow it open by shooting it) but if you want help just let me know. Otherwise just go to Gamefaqs.com and procede to the Faqs/Codes section and follow the walkthrough....sorry I can't be more help.